n 1  :  either of the two major forms of individuals that occur in many species and that are distinguished respectively as male or female  2  :  the sum of the structural, functional, and behavioral characteristics of living things that are involved in reproduction by two interacting parents and that distinguish males and females  3 a  :  sexually motivated phenomena or behavior  b  :  SEXUAL INTERCOURSE
vt :  to identify the sex of <techniques for ing human embryos>  .
 
 
 
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